Dear Rooters,
we encountered a probably simple problem, which we couldn't find in
the roottalk list, though.
When we allocate Histogramms with new in the constructor of MChip,
and store the MChip class into a root-file,
we get a segmentation violation error when accessing the restored
histogramms.
Is it necessary to write a default constructor for MChip which allocates
the histogramms again?
thanks,
Florian
class MChip : public TObject
{
private:
TH1F *CommonModeHist;
TH1F *NHitHist;
public:
MChip(){}
MChip(Int_t nChannel, TString Appelation );
ClassDef(MChip,1)
} ;
The Constructor looks something like that:
MChip::MChip(Int_t N, TString Appelation)
{
CommonModeHist = new TH1F("CommonMode","CommonMode",50,-25.0,25.0);
CommonModeHist->SetDirectory(0);
NHitHist = new TH1F("NHits","Number of Hits",10,0,10);
HitHist->SetDirectory(0);
}
----------------------------------------------------------------------
Florian Schopper office: Max-Plank-Institut fuer
extraterrestrische physik
Ludwig-Merk str. 3 Postfach 1603
80805 Muenchen Giessenbachstr.
phone: 49/89/3226157 Garching bei Muenchen
phone: 49/89/3299 3625
fax: 49/89/3299 3569
e-mail: fls@mpe-garching.mpg.de
http://home.cern.ch/~fschoppe
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